http://hrcak.srce.hr/index.php?show=clanak&amp;id_clanak_jezik=186545

Hristov, S.; Zlatanovic, Z.; Stankovic, Branislav; Dokmanović, Marija; Ostojić-Andrić, D.; Mekić, Cvijan

doi:10.15567/mljekarstvo.2014.0306

Cited by 5 publications

(13 citation statements)

References 14 publications

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“…(1) The ions reside on individual lattice sites. (2) The motion of the ions (external degree of freedom) can be described easiest in terms of common motional modes with the related quanta being phonons. The phonons in Coulomb crystals allow long-range interactions to be mediated between the spins associated with the ions.…”

Section: Ion Traps and Coulomb Crystalsmentioning

confidence: 99%

“…The effect of the centre-ofmass (COM) mode can be neglected (δ COM ≈ 100δ STR ). The ions are placed at the same phase of the stimulated-Raman interaction (ϕ (1) I = ϕ (2) I = 0). For t = T g = 2π/δ STR the time evolution operator equation (3.33) simplifies to…”

Section: Geometric Phase Gatesmentioning

confidence: 99%

“…where we have used η STR := η (1) STR = −η (2) STR and neglected the global phase arising from the 1…”

Section: Geometric Phase Gatesmentioning

confidence: 99%

“…Recently, one of the ten most powerful supercomputers, JUGENE in Jülich, was exploring this regime. The current record was set by simulating a system of 42 quantum bits (qubits), equivalent to 42 spin-1/2 particles [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…A promising strategy is to initialize an analogue QS in a state that can be prepared easily in the system of choice according to step (1) introduced above. Evolving the system adiabatically by changing its parameters according to (2) allows a new state to be reached that is hard or impossible to reach otherwise, for example, via a QPT. The aim here is not to simulate the effects including all disturbances and peculiarities, because the analogue QS would then become as complex as the system to be simulated.…”

Section: Introductionmentioning

confidence: 99%

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Experimental quantum simulations of many-body physics with trapped ions

2012

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Direct experimental access to some of the most intriguing quantum phenomena is not granted due to the lack of precise control of the relevant parameters in their naturally intricate environment. Their simulation on conventional computers is impossible, since quantum behaviour arising with superposition states or entanglement is not efficiently translatable into the classical language. However, one could gain deeper insight into complex quantum dynamics by experimentally simulating the quantum behaviour of interest in another quantum system, where the relevant parameters and interactions can be controlled and robust effects detected sufficiently well. Systems of trapped ions provide unique control of both the internal (electronic) and external (motional) degrees of freedom. The mutual Coulomb interaction between the ions allows for large interaction strengths at comparatively large mutual ion distances enabling individual control and readout. Systems of trapped ions therefore exhibit a prominent system in several physical disciplines, for example, quantum information processing or metrology. Here, we will give an overview of different trapping techniques of ions as well as implementations for coherent manipulation of their quantum states and discuss the related theoretical basics. We then report on the experimental and theoretical progress in simulating quantum many-body physics with trapped ions and present current approaches for scaling up to more ions and more-dimensional systems.

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Section: Ion Traps and Coulomb Crystalsmentioning

confidence: 99%

Section: Geometric Phase Gatesmentioning

confidence: 99%

“…where we have used η STR := η (1) STR = −η (2) STR and neglected the global phase arising from the 1…”

Section: Geometric Phase Gatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental quantum simulations of many-body physics with trapped ions

2012

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Bulk tank milk quality data is unlikely to give useful information about dairy cow welfare at herd level

Ginestreti

Strano

Lorenzi

et al. 2020

Journal of Dairy Research

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This research communication explores the value of routinely collected bulk tank milk quality data for estimating dairy cattle welfare at herd level. Selected bulk tank milk quality parameters (somatic cell count, total bacterial count, urea, protein and fat contents) recorded during the years 2014–2016 in 287 Italian dairy farms were compared with the animal welfare data of each farm. The welfare assessment data were extracted from the database of the Italian Reference Centre for Animal Welfare (CReNBA), which includes the outputs of the application of the CReNBA welfare assessment protocol for dairy cows, used at national level for on-farm controls. The statistical analysis was carried out using the correlation coefficient for Kendall's Tau ranks, in order to investigate the presence of a categoric relationship between the selected bulk tank milk quality parameters and the overall animal welfare score or the scores of the single areas A (farm management and staff training), B (housing) and C (animal-based measures). Somatic cell count, total bacterial count, urea and proteins demonstrated only a few statistically significant and very weak correlations with farm animal welfare data, while no significant correlations were obtained for milk fat content. Given the weak correlations found, the selected bulk tank milk parameters seems to be able to provide only limited information about the welfare level of the herd, thus it could be difficult to use them for drawing up a pre-screening model for identifying herds at risk of poor welfare.

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The influence of project-based learning on student achievement in elementary mathematics education

Lazić

Knežević²,

Maričić

2021

SAJE

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An effective instructional approach in elementary mathematics education has a significant role in the understanding of mathematical concepts and overall student achievement. We point out the characteristics, significance and effects that may be achieved in mathematics education through the application of project-based learning. The aim of the study was to examine the effects of project-based learning on student achievement in lower elementary mathematics education and examine whether the project-based model was equally acceptable to students with different marks. We arranged quasi-experimental research instruction (experiment with parallel groups), on a sample (N = 147) in order to examine whether an instructional approach based on the principles of project-based work would achieve better effects of learning and student achievement compared to the usual way of learning implemented in mathematics education. Results of the final measurements show that students in the experimental group, who worked according to the model of project-based work, achieved better compared to students who worked in the usual way. With this study we have shown that project-based instruction has significant effects on student achievement in lower elementary mathematics education, and that it can undoubtedly contribute to the methodological empowerment of teachers in their teaching practice.

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http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=186545

Cited by 5 publications

References 14 publications

Experimental quantum simulations of many-body physics with trapped ions

Experimental quantum simulations of many-body physics with trapped ions

Bulk tank milk quality data is unlikely to give useful information about dairy cow welfare at herd level

The influence of project-based learning on student achievement in elementary mathematics education

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